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From: James Clark <james.clark@arm.com>
To: acme@kernel.org, mathieu.poirier@linaro.org,
	coresight@lists.linaro.org, leo.yan@linaro.org
Cc: al.grant@arm.com, branislav.rankov@arm.com,
	suzuki.poulose@arm.com, anshuman.khandual@arm.com,
	James Clark <james.clark@arm.com>,
	Mike Leach <mike.leach@linaro.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	John Garry <john.garry@huawei.com>, Will Deacon <will@kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 4/6] perf cs-etm: Suppress printing when resetting decoder
Date: Tue, 13 Jul 2021 16:40:06 +0100	[thread overview]
Message-ID: <20210713154008.29656-5-james.clark@arm.com> (raw)
In-Reply-To: <20210713154008.29656-1-james.clark@arm.com>

The decoder is quite noisy when being reset. In a future commit,
dump-raw-trace will use a code path that resets the decoder rather than
creating a new one, so printing has to be suppressed to not flood the
output.

Signed-off-by: James Clark <james.clark@arm.com>
---
 tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
index 3e1a05bc82cc..ed1f0326f859 100644
--- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
+++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
@@ -35,6 +35,7 @@
 struct cs_etm_decoder {
 	void *data;
 	void (*packet_printer)(const char *msg);
+	bool suppress_printing;
 	dcd_tree_handle_t dcd_tree;
 	cs_etm_mem_cb_type mem_access;
 	ocsd_datapath_resp_t prev_return;
@@ -74,9 +75,10 @@ int cs_etm_decoder__reset(struct cs_etm_decoder *decoder)
 	ocsd_datapath_resp_t dp_ret;
 
 	decoder->prev_return = OCSD_RESP_CONT;
-
+	decoder->suppress_printing = true;
 	dp_ret = ocsd_dt_process_data(decoder->dcd_tree, OCSD_OP_RESET,
 				      0, 0, NULL, NULL);
+	decoder->suppress_printing = false;
 	if (OCSD_DATA_RESP_IS_FATAL(dp_ret))
 		return -1;
 
@@ -146,8 +148,10 @@ static void cs_etm_decoder__print_str_cb(const void *p_context,
 					 const char *msg,
 					 const int str_len)
 {
-	if (p_context && str_len)
-		((struct cs_etm_decoder *)p_context)->packet_printer(msg);
+	const struct cs_etm_decoder *decoder = p_context;
+
+	if (p_context && str_len && !decoder->suppress_printing)
+		decoder->packet_printer(msg);
 }
 
 static int
-- 
2.28.0


  parent reply	other threads:[~2021-07-13 15:40 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-13 15:40 [PATCH 0/6] perf cs-etm: Support TRBE (unformatted decoding) James Clark
2021-07-13 15:40 ` [PATCH 1/6] perf cs-etm: Refactor initialisation of kernel start address James Clark
2021-07-19 19:37   ` Mathieu Poirier
2021-07-13 15:40 ` [PATCH 2/6] perf cs-etm: Split setup and timestamp search functions James Clark
2021-07-19 19:38   ` Mathieu Poirier
2021-07-13 15:40 ` [PATCH 3/6] perf cs-etm: Only setup queues when they are modified James Clark
2021-07-19 19:38   ` Mathieu Poirier
2021-07-13 15:40 ` James Clark [this message]
2021-07-19 19:39   ` [PATCH 4/6] perf cs-etm: Suppress printing when resetting decoder Mathieu Poirier
2021-07-13 15:40 ` [PATCH 5/6] perf cs-etm: Use existing decoder instead of resetting it James Clark
2021-07-19 19:39   ` Mathieu Poirier
2021-07-13 15:40 ` [PATCH 6/6] perf cs-etm: Pass unformatted flag to decoder James Clark
2021-07-19 19:40   ` Mathieu Poirier
2021-07-20 15:45   ` Mathieu Poirier
2021-07-21  8:35     ` James Clark

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